Best environment variable manager for students

There are roughly 15-25 dedicated environment variable managers on the market today, but most cluster into two categories: enterprise-grade solutions (HashiCorp Vault, AWS Secrets Manager) that demand infrastructure knowledge, and lightweight CLI tools (dotenv, direnv) that lack UI polish and collaboration features. The actual pain point students face isn't the absence of tools—it's the absence of *approachable* tools that bridge learning and practice. They need something that teaches best practices (don't commit .env files, rotate secrets, use environment-specific configs) while staying simple enough to set up in 30 seconds. The gap exists in the "student-to-junior-dev" bridge: tools that are free or cheap, visually intuitive, support team collaboration for class projects, and include built-in tutorials. Most existing solutions either assume you already know what you're doing or lock features behind expensive tiers. A vibecoder entering this space should focus on: (1) zero friction onboarding—GitHub login, auto-detect your project type, instant setup; (2) educational content embedded in the product (inline tips on secret rotation, why you shouldn't hardcode API keys); (3) free tier that doesn't expire after 30 days; (4) built-in integrations with tools students actually use (GitHub, Vercel, Replit, local dev servers). The winner here won't be the most feature-rich—it'll be the one that makes managing secrets feel effortless and teaches good habits simultaneously.